Part of Community Storage on Mythril Platform Dissapeared

[ShadowBerryKing]

Hi, I have asked my townies if they did this and none of them advised me they did this but essentially multiple chests, 2 signs, 1 note block, 1 bell and 1 banner have gone missing, please find out who did this. If it's a townie, I will address it if not let me know who and we'll take it from there. Thank you for your help.
 
Unfortunately, once again I am unable to upload png files which is the default for minecraft screenshots. I am trying to save it as a jpg through photos and it still won't do anything. Regardless, please look into this, thank you again.